[Zope] secure management with Site Access?

Is anyone using the Apache/mod_proxy/SiteAccess method of using Zope with the ability to access a given virtual host both with and without SSL encryption? If so, can you give me some pointers on how to accomplish this? I'd like to use SSL for all of my management activity but have the main site be available for non-encrypted viewing. The 'SiteRoot', though, will only rewrite the URLs with either 'http' or 'https', and isn't smart enough to do one or the other depending on the form of the original request. Is what I want to do even possible, or will I have to resort to using some sort of PCGI solution to accomplish my goal? thanks, rob